There is a peculiarity in Gmail, where when using non-Android mobile devices such as Blackberry with an IMAP connection, emails deleted from the mobile device might go to Trash (where Gmail says after 30 days they’re permanently deleted), rather than going to All Mail for long term archiving.
If you use G Suite, use battery-efficient and prompt Exchange ActiveSync instead of the process below.
Candidate Fix for Gmail IMAP connections on non-Android devices:
The glitch comes in where you activate a non-Android device on Gmail but don’t have IMAP enabled in your Gmail settings webpage. For BB10 devices, the email will work, but clicking Trash or Delete on the Blackberry puts the email in Trash instead of Archive/All Mail. If you’d rather have the email be Archived, consider the following:
- Enable IMAP on the Gmail webpage under Settings > POP/IMAP Download
- Select the following:
- Auto-Expunge off - Wait for the client to update the server.
- Archive the message (default)